Abstract
Aims
The purpose of this study was to adapt the IIQ‐7 to suit the Egyptian culture and then to assess validity and reliability of the adapted and translated IIQ‐7 and UDI‐6.
Methods
IIQ‐7 was modified to suit Egyptian culture. Linguistic validation of the two questionnaires was done. Initial test–retest reliability and internal consistency of adapted translated questionnaires were done in a pilot study. The final validity, test–retest reliability and internal consistency study included 204 women with urinary incontinence (UI). Participants completed the two questionnaires at enrollment and after 2 weeks. All participants underwent urodynamics. Baseline urodynamic diagnosis was compared with diagnoses made by questionnaires to assess validity.
Results
Test–retest reliability was excellent for both the IIQ‐7 and UDI‐6. For the UDI‐6, the mean difference (SD) between first and second visits was −1.63 (7.0), and the 95% CI for the mean difference was −2.6 and −0.68. The 95% limits of agreement were −15.3 and 12.0. Lin's concordance correlation coefficient (LCCC) (95% CI) for the UDI was 0.89 (0.85 and 0.91). For the IIQ‐7, the mean difference (SD) was 0.37 (7.1), and the 95% CI for the mean difference was −0.60 and 1.3. The 95% limits of agreement were −13.5 and 14.2. LCCC (95% CI) for the IIQ was 0.90 (0.87 and 0.92). Internal consistency as assessed using Cronbach's α was 0.32 and 0.31 for the UDI‐6 and IIQ‐7, respectively. Validity assessments indicated that both IIQ and UDI scales can distinguish objective disease states. Conclusions: UDI‐6 and the modified IIQ‐7 are easy to administer, test–retest reliable, and valid questionnaires, with relatively low internal consistency. Neurourol. Urodynam. 28:33–39, 2009. © 2008 Wiley‐Liss, Inc.